/**
 * Copyright (c) 2009, Christian Schneider
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * - Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  - Neither the names of the authors nor the names of its contributors may
 *    be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package com.ruinwesen.patchmanager.swing.form;

import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;

public class ValidatorList implements FormElementValidator {

    private List<FormElementValidator> list = new LinkedList<FormElementValidator>();
    
    private String message;

    public ValidatorList(FormElementValidator ...validators) {
        this(null, validators);
    }
    
    public ValidatorList(String message, FormElementValidator ...validators) {
        this.message = message;
        list.addAll(Arrays.asList(validators));
    }
    
    public void add(FormElementValidator validator) {
        if (validator == null) {
            throw new NullPointerException();
        }
        list.add(validator);
    }
    
    public boolean isValid(FormElement elem) {
        for (FormElementValidator validator: list) {
            if (!validator.isValid(elem)) {
                return false;
            }
        }
        return true;
    }

    public void validate(FormElement elem) throws ValidationError {
        if (message != null) {
            if (!isValid(elem)) {
                throw new ValidationError(elem, message);
            }
        } else {
            for (FormElementValidator validator: list) {
                validator.validate(elem);
            }
        }
    }

}
